High bismuth-doped germanosilicate fiber for efficient E + S-band amplification

• DOI: 10.1364/ol.506036
• Publication Date: 2023-12-04T16:00:08Z
• Authors: Shaokun Liu; Xiaoke Yin; Zhimu Gu; Le He; Wenzhen Li; Yang Chen; Yingbin Xing; Yingbo Chu; Nengli Dai; Jinyan Li
• Keywords: Bismuth; Amplified spontaneous emission; SIGNAL (programming language)

Bismuth-doped germanosilicate fiber (BGSF), the active media of amplifiers, has attracted widespread attention. Here, we report a BGSF with high bismuth concentration 0.075 wt. % and achieve high-efficiency E + S-band amplification, which was prepared by modified chemical vapor deposition (MCVD) process. The small signal absorption (SSA) unsaturated loss (UL) at 1310 nm are 1.32 0.11 dB/m, respectively. results show record only 45 m created, to best our knowledge, provides maximum gain 39.24 dB an NF 6.2 1430 under -20 dBm input power.